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US RE44,974 E1Granted
Keypad assembly
AssigneeSamsung Electronics Co., Ltd.
InventorsYu-Sheop Lee, Sun-Tae Jung, Joo-Hoon Lee
Life of this patent
Estimating the term…
Abstract
Disclosed is a keypad assembly including a light guide panel, light, at least one light extracting pattern provided on the light guide panel so that light propagating inside the light guide panel is directed out of the light guide panel, a switch board having at least one switch; and at least one light source for coupling light to the inside of the light guide panel, wherein the light guide panel has a thickness of 0.03-0.6 mm.
Claims27
A keypad assembly comprising:
- a light guide panel made of a rubber-based material and having a thickness of 0.3-0.4 mm;
- at least one light extracting pattern provided on the light guide panel so that light propagating inside the light guide panel is directed out of the light guide panel;
- a switch board having at least one switch;
- and
- at least one light source for coupling light to the inside of the light guide panel.
2 more elements
A keypad assembly comprising:
- a light guide panel made of a rubber-based material and having a thickness of 0.3-0.4 mm;
- at least one light extracting pattern composed of a plurality of V-shaped elements on the light guide panel, wherein the density of the light extracting pattern increases in the direction of the light propagating inside the light guide;
- a switch board having at least one switch;
- and
- at least one light source for coupling light to the inside of the light guide panel.
2 more elements
A keypad assembly comprising:
- a light guide plate made of polycarbonate and having a thickness of 0.03 mm-0.2 mm;
- at least one light extracting pattern provided on the light guide plate so that light propagating inside the light guide plate is directed out of the light guide plate;
- a switch board having at least one switch;
- and
- at least one light source for coupling light to the inside of the light guide plate.
2 more elements
A keypad assembly comprising:
- a light guide plate made of polyurethane and having a thickness of 0.03 mm-0.2 mm;
- at least one light extracting pattern provided on the light guide plate so that light propagating inside the light guide plate is directed out of the light guide plate;
- a switch board having at least one switch;
- and
- at least one light source for coupling light to the inside of the light guide plate.
2 more elements
A keypad assembly comprising:
- a light guide plate made of polymethylmethacrylate (PMMA) and having a thickness of 0.03 mm-0.2 mm;
- at least one light extracting pattern provided on the light guide plate so that light propagating inside the light guide plate is directed out of the light guide plate;
- a switch board having at least one switch;
- and
- at least one light source for coupling light to the inside of the light guide plate.
2 more elements
Dependencies are inferred from the claim text.